commit 39d2cad7d1e33bc084416cdf5d132f8475ac1082
author Mark Lobodzinski <mark@lunarg.com> Wed Mar 01 16:09:07 2017 -0700
committer Mark Lobodzinski <mark@lunarg.com> Mon Mar 13 16:02:59 2017 -0600
tree c1cb2e5b8babed311eaa5de20d5a36d3b8d307a0
parent 262f61fcb35dcf11e05f25598c4e9949253443f6

layers: Add compressed texture query utils

These functions help to identify compressed formats categories.

Change-Id: Ia21da00924eb1f5c6f4a5310676e056899c340af

layers/vk_layer_utils.cpp

diff --git a/layers/vk_layer_utils.cpp b/layers/vk_layer_utils.cpp
index 62ccf35..5436b82 100644
--- a/layers/vk_layer_utils.cpp
+++ b/layers/vk_layer_utils.cpp
@@ -235,6 +235,99 @@
 // Renable formatting
 // clang-format on
 
+// Return true if format is an ETC2 or EAC compressed texture format
+VK_LAYER_EXPORT bool vk_format_is_compressed_ETC2_EAC(VkFormat format) {
+    bool found = false;
+
+    switch (format) {
+        case VK_FORMAT_ETC2_R8G8B8_UNORM_BLOCK:
+        case VK_FORMAT_ETC2_R8G8B8_SRGB_BLOCK:
+        case VK_FORMAT_ETC2_R8G8B8A1_UNORM_BLOCK:
+        case VK_FORMAT_ETC2_R8G8B8A1_SRGB_BLOCK:
+        case VK_FORMAT_ETC2_R8G8B8A8_UNORM_BLOCK:
+        case VK_FORMAT_ETC2_R8G8B8A8_SRGB_BLOCK:
+        case VK_FORMAT_EAC_R11_UNORM_BLOCK:
+        case VK_FORMAT_EAC_R11_SNORM_BLOCK:
+        case VK_FORMAT_EAC_R11G11_UNORM_BLOCK:
+        case VK_FORMAT_EAC_R11G11_SNORM_BLOCK:
+            found = true;
+            break;
+        default:
+            break;
+    }
+    return found;
+}
+
+// Return true if format is an ETC2 or EAC compressed texture format
+VK_LAYER_EXPORT bool vk_format_is_compressed_ASTC_LDR(VkFormat format) {
+    bool found = false;
+
+    switch (format) {
+        case VK_FORMAT_ASTC_4x4_UNORM_BLOCK:
+        case VK_FORMAT_ASTC_4x4_SRGB_BLOCK:
+        case VK_FORMAT_ASTC_5x4_UNORM_BLOCK:
+        case VK_FORMAT_ASTC_5x4_SRGB_BLOCK:
+        case VK_FORMAT_ASTC_5x5_UNORM_BLOCK:
+        case VK_FORMAT_ASTC_5x5_SRGB_BLOCK:
+        case VK_FORMAT_ASTC_6x5_UNORM_BLOCK:
+        case VK_FORMAT_ASTC_6x5_SRGB_BLOCK:
+        case VK_FORMAT_ASTC_6x6_UNORM_BLOCK:
+        case VK_FORMAT_ASTC_6x6_SRGB_BLOCK:
+        case VK_FORMAT_ASTC_8x5_UNORM_BLOCK:
+        case VK_FORMAT_ASTC_8x5_SRGB_BLOCK:
+        case VK_FORMAT_ASTC_8x6_UNORM_BLOCK:
+        case VK_FORMAT_ASTC_8x6_SRGB_BLOCK:
+        case VK_FORMAT_ASTC_8x8_UNORM_BLOCK:
+        case VK_FORMAT_ASTC_8x8_SRGB_BLOCK:
+        case VK_FORMAT_ASTC_10x5_UNORM_BLOCK:
+        case VK_FORMAT_ASTC_10x5_SRGB_BLOCK:
+        case VK_FORMAT_ASTC_10x6_UNORM_BLOCK:
+        case VK_FORMAT_ASTC_10x6_SRGB_BLOCK:
+        case VK_FORMAT_ASTC_10x8_UNORM_BLOCK:
+        case VK_FORMAT_ASTC_10x8_SRGB_BLOCK:
+        case VK_FORMAT_ASTC_10x10_UNORM_BLOCK:
+        case VK_FORMAT_ASTC_10x10_SRGB_BLOCK:
+        case VK_FORMAT_ASTC_12x10_UNORM_BLOCK:
+        case VK_FORMAT_ASTC_12x10_SRGB_BLOCK:
+        case VK_FORMAT_ASTC_12x12_UNORM_BLOCK:
+        case VK_FORMAT_ASTC_12x12_SRGB_BLOCK:
+            found = true;
+            break;
+        default:
+            break;
+    }
+    return found;
+}
+
+// Return true if format is a BC compressed texture format
+VK_LAYER_EXPORT bool vk_format_is_compressed_BC(VkFormat format) {
+    bool found = false;
+
+    switch (format) {
+        case VK_FORMAT_BC1_RGB_UNORM_BLOCK:
+        case VK_FORMAT_BC1_RGB_SRGB_BLOCK:
+        case VK_FORMAT_BC1_RGBA_UNORM_BLOCK:
+        case VK_FORMAT_BC1_RGBA_SRGB_BLOCK:
+        case VK_FORMAT_BC2_UNORM_BLOCK:
+        case VK_FORMAT_BC2_SRGB_BLOCK:
+        case VK_FORMAT_BC3_UNORM_BLOCK:
+        case VK_FORMAT_BC3_SRGB_BLOCK:
+        case VK_FORMAT_BC4_UNORM_BLOCK:
+        case VK_FORMAT_BC4_SNORM_BLOCK:
+        case VK_FORMAT_BC5_UNORM_BLOCK:
+        case VK_FORMAT_BC5_SNORM_BLOCK:
+        case VK_FORMAT_BC6H_UFLOAT_BLOCK:
+        case VK_FORMAT_BC6H_SFLOAT_BLOCK:
+        case VK_FORMAT_BC7_UNORM_BLOCK:
+        case VK_FORMAT_BC7_SRGB_BLOCK:
+            found = true;
+            break;
+        default:
+            break;
+    }
+    return found;
+}
+
 // Return true if format is a depth or stencil format
 VK_LAYER_EXPORT bool vk_format_is_depth_or_stencil(VkFormat format) {
     return (vk_format_is_depth_and_stencil(format) || vk_format_is_depth_only(format) || vk_format_is_stencil_only(format));

layers/vk_layer_utils.h

diff --git a/layers/vk_layer_utils.h b/layers/vk_layer_utils.h
index 68724c8..98107ff 100644
--- a/layers/vk_layer_utils.h
+++ b/layers/vk_layer_utils.h
@@ -113,6 +113,9 @@
     return (vk_format_is_stencil_only(format) || vk_format_is_depth_and_stencil(format));
 }
 
+VK_LAYER_EXPORT bool vk_format_is_compressed_ETC2_EAC(VkFormat format);
+VK_LAYER_EXPORT bool vk_format_is_compressed_ASTC_LDR(VkFormat format);
+VK_LAYER_EXPORT bool vk_format_is_compressed_BC(VkFormat format);
 VK_LAYER_EXPORT bool vk_format_is_norm(VkFormat format);
 VK_LAYER_EXPORT bool vk_format_is_unorm(VkFormat format);
 VK_LAYER_EXPORT bool vk_format_is_snorm(VkFormat format);